HOLMDEL — The sale of a relaxation drink that sickened several students at Satz Middle School on Friday has prompted an investigation by the school district’s food service provider.

Chartwells School Dining Services removed Marley’s Mellow Mood drinks and teas from Satz and Holmdel High School and said the product was not approved for sale at any of its schools. An on-site manager has also been removed pending the investigation, Chartwells said in a statement released Monday.

“We sincerely regret that this product was sold and that students had an adverse reaction to it,” the statement said. “Chartwells takes great pride and care in partnering with our school communities to provide the best school dining experience possible and we take this situation very seriously.”

Marley’s Mellow Mood drink, created in partnership with musician Bob Marley’s family, contains ingredients such as valerian root that promote relaxation and reduce stress, according to its website.

The drink’s nutrition facts state that it may cause drowsiness and is not intended for children.